influenza shots and allergies

Hi guys!
I’ve been thinking about getting an influenza shot this year, because I’ve been really ill twice last winter and it really interfered with my coleege studies.

The reason I’m writing is because I have mild hayfever evry spring (simple antihistamines thake care of it, though), and I was told that hayfever and influenza shots don’t tango. Any truth to this?

Cheers,
The S